All Stories by Anna Gibbs
- Health & Medicine
What experts told me to do after my positive COVID-19 at-home test
Rapid at-home tests mean many COVID-19 cases go unreported, but they’re a great tool for deciding when to leave isolation. I found that out firsthand.
- Particle Physics
A new nuclear imaging prototype detects tumors’ faint glow
Nuclear imaging that relies on Cerenkov light could supplement standard-of-care technology for identifying location of tumors.
- Archaeology
This hieroglyph is the oldest known record of the Maya calendar
Plaster fragments with the markings date to at least 200 B.C. and indicate that the calendar system, still used today, might be centuries older.
- Paleontology
A hole in a Triceratops named Big John probably came from combat
The nature of the wound and signs of healing suggest that the dinosaur's bony frill was impaled by a Triceratops rival.
- Animals
How scientists found an African bat lost to science for 40 years
African researchers had been searching for the Hill’s horseshoe bat since 2013. Now, the first recording of its echolocation call may help find more.
- Chemistry
Grainy ice cream is unpleasant. Plant-based nanocrystals might help
The growth of large ice crystals in ice cream produces a coarse texture. A cellulose nanocrystal stabilizer could help keep the unwelcome iciness away.
- Health & Medicine
School mask mandates in the U.S. reduced coronavirus transmission
Mandatory masking lowered transmission rates to nearly one-fourth those of schools where masks were optional, data from over 1 million children show.
- Genetics
An extinct rat shows CRISPR’s limits for resurrecting species
Scientists recovered most of the Christmas Island rat’s genome. But the missing genes signal a problem for using gene editing to de-extinct species.
- Paleontology
Scientists are arguing over the identity of a fossilized 10-armed creature
An ancient cephalopod fossil may be the oldest ancestor of octopuses, but the interpretation hinges on the identification of one feature.
- Life
Why kitchen sponges are the perfect home for bacteria
Sponges are remarkably diverse hot spots for bacteria, in part because of the mixed-housing environment that the tools offer their tenants.
- Animals
How lizards keep detachable tails from falling off
A hierarchical structure of micropillars and nanopores allows the tail to break away when necessary while preventing it from easily detaching.
- Animals
Gory footage confirms orca pods can kill adult blue whales
For the first time, three recorded events show that orcas do hunt and eat blue whales using coordinated attacks that have worked on other large whales.
